Liquid density of HFE-7000 and HFE-7100 from T = (283 to 363) K at pressures up to 100 MPa

In this paper, liquid densities for HFE-7000 (1-methoxyheptafluoropropane) and HFE-7100 (methoxynonafluorobutane) are reported in the temperature range from (283 to 363) K and pressures up to 100 MPa. The measurements were conducted with a high pressure vibrating-tube densimeter with combined expanded uncertainties (k = 2) of 16 mK in temperature, 0.062 MPa (p < 60 MPa) and 0.192 MPa (60 MPa < p < 100 MPa) in pressure, and 0.6 kg . m (3) in density. The experimental densities were correlated to the modified Tait equation with an absolute average percentage deviation of 0.019% and 0.034% for HFE-7000 and HFE-7100, separately. In addition, the isothermal compressibility and isobaric thermal expansivity have been derived from these density data. (C) 2014 Elsevier Ltd. All rights reserved.